 Who: GLaDOS Source: Portal Notes: GLaDOS had promised Chell a cake in return for doing a "test" of Aperture Science's new Portal Gun in the Enrichment center. GLaDOS said this as Chell destroys the last of GLaDOS's spheres, causing GLaDOS to violently explode and blast Chell out of the Enrichment Center. However, she survived and returned in Portal 2.